Currently, userspace is able to initiate costly high-order allocation in kernel sending large broadcast netlink message, which is considered undesirable. At the same time, unicast message are safe in this regard, because they uses vmalloc-ed memory.
This series introduces changes, that allow broadcast messages to be allocated with vmalloc() as well as unicast. Jan Dakinevich (3): skbuff: use kvfree() to deallocate head netlink: always use vmapped memory for skb data netlink: use generic skb_set_owner_r() include/linux/netlink.h | 16 ---------------- net/core/skbuff.c | 2 +- net/ipv4/fib_frontend.c | 2 +- net/netfilter/nfnetlink.c | 2 +- net/netlink/af_netlink.c | 39 +++++++-------------------------------- 5 files changed, 10 insertions(+), 51 deletions(-) -- 2.1.4
